It would be tedious and annoying to watch a movie of real dialog. That’s why there’s so much editing in documentaries.

No, I don’t think you want more realism in fictional writing. I’ve written two fiction books, and dialog is hard to get right, especially for characters very different from myself. When I first start, I don’t know the characters well, and I get the dialog wrong. About 3/4 of the way through the book, I go back and rewrite a lot of the dialog because I know the characters better by then.

For me, the fascinating part about writing fiction is that I don’t always know what the character is going to say, or do. I just have a general idea of what needs to happen in each section, but sometimes I’m surprised at the solutions they come up with. It really feels like I’m just an observer for parts of the process. They say what they say, and I write it down.

The worst thing that can happen while writing is to lose a conversation due to some technical reason. Because, I’ll never be able to recreate it exactly as it was the first time. I just need to ask them again, and start over.

If you’ve never tried writing fiction, I recommend it. It doesn’t need to be “good”, and you never need to show it to anyone, but I think you’ll learn a lot about yourself and how you see the world.